Does the Curie point of a material, if lower than the operating temperature, affect the accuracy or reliability of electrochemical measurements? I am conducting electrochemical measurements at approximately 900 °C using various molten salts as the electrolyte. My challenge lies in identifying an affordable material to replace platinum for the wires attached to my electrodes (in my case, the reference and the counter electrodes are both platinum rods). The material must:
I initially tested copper wires but found them unsuitable due to rapid degradation. I am exploring other options and would greatly appreciate any suggestions based on experience or literature.
Additionally, I am curious about the impact of the Curie point of materials (if below the operating temperature) on the measurement system. Specifically, does the loss of ferromagnetic properties at high temperatures interfere with the electrochemical system's performance?
Any advice, insights, or references on these issues would be immensely helpful.
The Curie point, the temperature at which a material loses its ferromagnetic properties, primarily affects the material's magnetic behavior. In the context of electrochemical measurements, where the primary concern is electrical conductivity and chemical stability, the loss of ferromagnetic properties typically doesn't directly impact the accuracy or reliability of the measurements.
However, there are a few indirect implications to consider:
Material Selection for High-Temperature Electrodes:
Given your specific requirements, here are a few materials to consider:
Dear Soroush Asgharian
I attach for you the trial presented in the publication titled "Setup for High-Temperature (Up to 1100 °C)Electrochemical Impedance Spectroscopy" shown by the RG link below. Hope its helpful.
https://www.researchgate.net/publication/358806940_Springer_Easy-Made_Setup_for_High-Temperature_Up_to_1100C_Electrochemical_Impedance_Spectroscopy
Dear Mohammed Hussein j. H. Al'Atia
Thank you for your thoughtful response and for recommending the article; I found it to be incredibly innovative. I wanted to inform you that I am required to conduct my tests in a controlled atmosphere furnace; therefore, this setup will not be very useful. This is necessary because the oxide layer that forms thermally on the substrate interacts with the sulfate content of Na2SO4, which accelerates the hot corrosion process. Additionally, I noticed that the article utilized Pt-Rh wires for connecting the setup to the instrument, but unfortunately, this option is currently beyond our research group’s budget :( . I would greatly appreciate any further information or insights you could provide regarding this matter.
Dear Soroush Asgharian
Hope the attached patent is helpful ... my best regards
https://patentimages.storage.googleapis.com/ad/18/87/7db1cf5d931cd4/CA2883430C.pdf
For high-temperature electrochemical measurements, tungsten, molybdenum, or carbon nanotubes are excellent choices due to their conductivity, stability, and resistance to degradation in molten salt environments. My suggestion, please conduct a patent landscape, If any help is required, please let us know.
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